[PATCH 0/3] powerpc: Instrument Hypervisor Calls

[Luke Browning]

linuxppc-dev-bounces+lukebrowning=us.ibm.com at ozlabs.org wrote on 
07/15/2006 12:30:54 PM:

> 
> > What happened to the question whether to use PURR values for also 
measuring
> > cycles spent executing the hcall as opposed to cycles that passed 
before
> > the hcall returns. Did that turn out not giving extra information 
after all
> > or was there a different reason to drop that idea?
> 
> You have to be careful with PURR since it may be context switched
> between partitions.
> 

That shouldn't be an issue as the PURR is supposed to be virtualized by 
PHYP at 
the virtual processor level.

Luke
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